Abstract: A control for controlling the amount of heated fluid entering the inlet of the driving heat source for a refrigerant absorption cycle is controlled to vary the relative amount of heated fluid entering the driving heat source inlet, and being dumped to atmosphere. Preferably, a diverter valve is utilized such that a first valve body (40) communicates the flow into the driving heat source inlet, and moves in opposition to a second valve body (46) controlling the flow through the exhaust. The two valves bodies (40, 46) are preferably mechanically linked. Since the heated fluid is not allowed to enter the refrigerant absorption cycle as its drive heating source, no additional hardware and control for dumping excess heat is necessary within the refrigerant absorption cycle. A computer control preferably drives the first valve to a precise position and the linkage ensures the second valve is also received at a precise position.

Abstract: A device for controlling the-flow of a fluid in one or more conduits in an electrical appliance, particularly in a dishwasher machine, comprises at least a control member, movable between two or more positions, and shape memory actuator means of control member.

Abstract: A method of fabricating an elastomeric structure, comprising: forming a first elastomeric layer on top of a first micromachined mold, the first micromachined mold having a first raised protrusion which forms a first recess extending along a bottom surface of the first elastomeric layer; forming a second elastomeric layer on top of a second micromachined mold, the second micromachined mold having a second raised protrusion which forms a second recess extending along a bottom surface of the second elastomeric layer; bonding the bottom surface of the second elastomeric layer onto a top surface of the first elastomeric layer such that a control channel forms in the second recess between the first and second elastomeric layers; and positioning the first elastomeric layer on top of a planar substrate such that a flow channel forms in the first recess between the first elastomeric layer and the planar substrate.

Abstract: A valve for redirecting flow in a supercritical fluid or other high pressure processing system is disclosed. In high pressure supercritical carbon dioxide (SCCO2) equipment for semiconductor wafer processing, a major hurtle in providing clean equipment and clean wafers. A clean flow diverting valve is provided having no grease or other contaminants, and having no rubbing seal surfaces, but rather incorporates a magnetically coupled valve actuator to move a ball or other valve seat for diverting flow between a common port and alternative switched ports in a non-rubbing, non-contact manner. The valve is useful in semiconductor wafer high pressure processing tools for redirecting flow from a common inlet to alternative outlets or for admitting flow from alternative inlets to a common outlet.

Abstract: Methods and apparatus for selectively blocking or redirecting flow with a valve that compensates for misalignment between a seat and a gate are disclosed. In one aspect, a valve includes a gate having two discs spaced from one another, first and second seats within first and second passageways of the valve, respectively, and at least one lever arm coupled to an actuator for rotating the gate, thereby diverting flow. The lever arm is disposed between the discs and pivotally couples to the gate such that the pivoting movement of the gate enables compensation for the misalignment. A method includes rotating a gate from a first position with a plane of the gate axially aligned with flow to a second position with the disc initially contacting a seat and compensating for the misalignment by pivoting the gate with respect to the lever arm such that the gate squarely contacts the seat.

Abstract: A dual air supply breathing apparatus that allows a user to quickly and easily switch between two or more sources of air or compressed gas, such as filtered air from a Powered Air Purifying Respirator (PAPR) and compressed air from a Self-Contained Breathing Apparatus (SCBA). In one variation, the dual air supply breathing apparatus uses a Y-shaped changeover valve with two input tubes and one output tube. The first input tube receives filtered air from a PAPR and the second input tube receives compressed air from a tank. An actuator controls a flap valve within the changeover valve to seal off one of the input tubes while creating a flow path between the other input tube and the output tube. The changeover valve may be controlled by manipulating the high-pressure valve on the tank of compressed gas and/or by manipulating the switch that activates the PAPR.

Abstract: A damper device includes a first baffle capable of opening or closing a first opening portion by turning about its axis and a second baffle capable of opening or closing a second opening portion by turning about its axis. A common drive source for driving the first baffle and the second baffle and a gear train by which the output from the drive source is transmitted to the first baffle and the second baffle are also provided. The device also includes a first rotary shaft driven by the gear train for driving the first baffle and a second rotary shaft driven by the gear train for driving the second baffle. The first rotary shaft and the second rotary shaft are arranged to be extended from the positions adjacent to each other on the gear train toward one side in an axial direction of the gear train.

Abstract: The invention relates to a switch valve for the exhaust gases of an internal combustion engine. The switch valve includes a housing part in which an inlet and a first outlet and a second outlet are formed. A directional control member in the form of a swinging flap is located within the housing part and either the first outlet or the second outlet may selectively be closed, as a result of which the respective other outlet is in connection with the inlet. In order to minimize the production effort while achieving a simple structural design and high efficiency, it is proposed that an encircling rim, for establishing sealing contact with the flap, is formed in the interior of the housing part in the transitional region between the inlet and each of the outlets, each rim defining a stop plane for the flap.

Abstract: A valve for automatically and proportionally adjusting fluid flow between an engine and a radiator for cooling the fluid heated by the engine in response to changes in fluid temperature within a range of operating temperatures. The valve includes a housing having a chamber. The housing includes a radiator flow port for passing fluid between the radiator and the chamber. A vane pivotally disposed in the chamber has a vane wall engagable with the radiator port for restricting fluid flow. A drive assembly is operatively coupled to the vane for varying the position of the vane within the chamber.

Abstract: The present invention is directed to an exhaust gas control (EGC) valve. The EGC valve comprises a valve housing having at least one inlet port, at least one outlet port, and a flow channel having a centerline extending between the ports. A valve seat is adjacent an opening in the at least one outlet port. The EGC valve further comprises a rotatable actuator shaft offset from the centerline. At least one L-shaped valve armature is operably connected to the actuator shaft. The valve armature has a first leg and a second leg. The first leg is connected to the actuator shaft so that rotation of the actuator shaft in a first direction positions the second leg into sealing engagement with the valve seat to close the flow channel.

Abstract: An alternating pressure valve system is provided comprising a blower with an air intake and an air outlet; a rotor valve assembly connected to the air outlet from the blower where the rotor valve assembly comprising: a housing with an air intake, a first air outlet, a second air outlet, and a circular chamber; and a wedged shaped rotor valve rotatably contained within the circular chamber of the housing such that the rotor valve can rotate to partially block the first air outlet, partially block the second air outlet, or block neither air outlets; The rotor valve is preferably controlled by a gearmotor and pressure sensors to detect the relative pressure in each outlet.

Abstract: A mix door (5) is arranged in air passages (10, 11) of an automotive air conditioning device. The mix door (5) is arranged to extend in a direction to shut an air flow blown from the upstream air passage (10) and swelled in a downstream direction with a predetermined radius of curvature. The door (5) is guided by arcuate cam grooves (19) and driven upward and downward to achieve open/close operation with the aid of a sliding mechanism (M). Compact construction, reduction in air flow resistance, smoothed handling, high sealing and high temperature controlling are achieved.

Abstract: A bypass control valve including a wall that defines a first passage disposed along a first axis and having a first portion, a second portion, and a transitional portion disposed between the first and second portion. The transitional portion has a first port, a pivot point, and an annular locking member proximate the transitional portion, with the first port having a sealing surface disposed thereon. The bypass control valve also includes a first bypass passage disposed along a second axis oblique to the first axis. The first bypass passage has a second port, which projects into the transitional portion and which has a sealing surface and a receiver portion. The receiver portion is coupled to the locking members. The bypass control valve further includes a closure member having a first planar surface and a second planar surface with at least one elastomeric member disposed on each of the first planar surface and the second planar surface.

Abstract: An exhaust gas purifying apparatus for internal combustion engines, which comprises an exhaust pipe, a branched exhaust pipe, a first NOx adsorbing catalyst provided in the exhaust pipe, a second small-sized NOx adsorbing catalyst provided in the branched exhaust pipe, and an exhaust switchover valve. The exhaust switchover valve including exhaust holes, a first feed pipe having a first switchover valve, and a second feed pipe having a second switchover valve, the first and second feed pipes being opened between the exhaust switchover valve and the first NOx adsorbing catalyst and between the exhaust switchover valve and the second NOx adsorbing catalyst, respectively. The first and second feed pipes are supplied with a fuel from a feed pump. A controller is connected to a NOx accumulation checking device, exhaust switchover valve, first switchover valve, and the second switchover valve.

Abstract: The invention relates to a valve, in particular for the fluid circulation in a motor vehicle, having a housing (12) with at least one inlet (14) and at least one outlet (16, 18) that communicate with one another via a passage (20), and having a valve member (22), which is embodied as a movable flap (24) that monitors the passage (22), wherein the passage (20) has a chamber (26) in which the flap (24) is disposed and into which the at least one inlet (14) and the at least one outlet (16, 18) discharge, wherein the flap (24) is pivotably supported in the housing (12) and can be shifted via a drive mechanism (36, 70) from a first terminal position (38) to a second terminal position (40), and wherein the terminal positions (38, 40) form an angle (&agr;) that is smaller than 90°.

Abstract: The invention relates to a switch valve for the exhaust gases of an internal combustion engine. The switch valve includes a housing part in which an inlet and a first outlet and a second outlet are formed. A directional control member in the form of a swinging flap is located within the housing part and either the first outlet or the second outlet may selectively be closed, as a result of which the respective other outlet is in connection with the inlet. In order to minimize the production effort while achieving a simple structural design and high efficiency, it is proposed that an encircling rim, for establishing sealing contact with the flap, is formed in the interior of the housing part in the transitional region between the inlet and each of the outlets, each rim defining a stop plane for the flap.

Abstract: The invention relates to an apparatus for dividing an entering gas flow (1) into two split flows (20, 21), each of which flows through a branch (8, 9) of a line system. A control element (7) is provided, which executes a control motion (26) about a shaft (10) between a first position (27) and a second position (28). The entering gas flow (1) is divided continuously, by means of the adjustable control element (7), at a volumetric flow ratio VGas, and at the same time the control element (7) allocates a medium (5) to be metered, whose infeed point (3, 25) is associated with the control element (7), to the split flows (20, 21) at a different ratio VDOS.

Abstract: An improved cooling system for an internal combustion engine is disclosed. The system utilizes an electronically controlled butterfly valve to control coolant flow between the engine and a radiator, thereby maintaining the engine temperature at a substantially optimum temperature. The valve includes a valve housing having an inlet port in fluid communication with an outlet port. A valve core is seated in the housing for selectively opening and closing the outlet port. A driving mechanism is operatively coupled to the valve core for positioning the valve core between open and closed positions relative to the outlet port. A damping mechanism is coupled between the driving mechanism and the valve core for preventing the driving mechanism from locking in the open or closed position during loading of the valve core with the housing and inlet or outlet ports.

Abstract: A valve, especially a switch-over valve for large channel cross sections, is provided. A wing is pivotably mounted in a housing having channel connections. A fixating lever assembly provides for movement of the wing and includes a fixating lever and at least one link rod, one end of which is pivotably connected with the fixating lever while the other end is pivotably connected with the wing. A respective driver passes through and is mounted on opposite side walls of the housing. An inner end of each driver is connected to the fixating lever of a given one of the assemblies. A rotary drive mechanism engages an outer end of each driver.

Abstract: The present invention is a continuous irrigation system for medical applications, including transurethral resection procedures, which provides automatic bag switching. It includes: (a) a first and second liquid irrigation bag; (b) a first proximal tubing and a second proximal tubing extending from the first liquid irrigation bag and the second liquid irrigation bag, respectively, and (c) a control valve device. The control valve device includes: (i) a main housing having a hollow body and a top and a bottom; (ii) an outlet located on and extending downwardly from the bottom for attachment of distal delivery tubing thereto; (iii) two inlets, located on or near the top of the main housing for the first and second proximal tubing; (iv) a floatation valve for opening and closing the second inlet. There is a distal delivery tubing connected to the outlet.

Abstract: A bypass control valve including a wall that defines a first passage disposed along a first axis and having a first portion, a second portion, and a transitional portion disposed between the first and second portion. The transitional portion has a first port, a pivot point, and an annular locking member proximate the transitional portion, with the first port having a sealing surface disposed thereon. The bypass control valve also includes a first bypass passage disposed along a second axis oblique to the first axis. The first bypass passage has a second port, which projects into the transitional portion and which has a sealing surface and a receiver portion. The receiver portion is coupled to the locking members. The bypass control valve further includes a closure member having a first planar surface and a second planar surface with at least one elastomeric member disposed on each of the first planar surface and the second planar surface.

Abstract: The present invention has for its object an assembly with a gate valve or distribution or a closure valve, as well as a device for the circulation and distribution of fluid comprising such an assembly.

Abstract: An air handling system includes an air handling device connectable to a duct network that is underneath a field having grass growing in it, at least one sensor disposed to measure a variable associated with the field, and a control unit connected to the air handling device to control operating parameters of the air handling device responsive to an output from the sensor. A heat exchanger is optionally part of the system. The variables associated with the field include temperature and moisture. The operating parameters of the air handling device include direction of the air flow, temperature of the air directed into the duct network, and the time of operation of the unit. The system optionally includes programmable control logic so that the sensor output automatically controls the operating parameters of the system. A computer with display is used to program the control logic, which can be done remotely over a modem or the internet.

Abstract: A damper vane assembly for controlling the flow of flue gas between a flue gas pass of a combustion vessel which generates flue gas and a selective catalytic reactor operable to catalytically treat flue gas in a combustion system is provided. The damper vane assembly includes a first turning vane having a curved extent and a second turning vane with a curved extent. The first turning vane is moveable between a blocking position in which it blocks communication between the combustion vessel and the selective catalytic reactor and a flow guiding position in which the curved extent of the first turning vane guides flue gas from the flue outlet to the selective catalytic reactor. The second turning vane is moveable between a blocking position in which it blocks communication between the selective catalytic reactor and the flue gas outlet and a flow guiding position in which the curved extent of the second turning vane guides flue gas from the selective catalytic reactor to the flue gas outlet.

Abstract: An interface for connecting a first vacuum source to a first vacuum apparatus, and for selectively connecting the first vacuum source and the first vacuum apparatus to a second vacuum apparatus without venting the first vacuum apparatus. A third fitting is connected to the first vacuum source, and makes a hermetic seal between the first vacuum source and the interface. A vacuum source line, having a first end and a second end, is connected by its first end to the third fitting. The vacuum source line receives a vacuum from the first vacuum source, and conducts the vacuum through the vacuum source line. A first tee section, having a first end and a second end, is connected by its first end to the second end of the vacuum source line. The first tee section receives the vacuum from the vacuum source line and conducts the vacuum through the first tee section.

Abstract: A valve housing has three ports with butterfly valves mounted in two of the ports with stems coupled to the valve disks and extending through opposite sides of the housing. A linkage couples the valve stems together at one side of the housing, while an actuator is coupled to at least one of the valve stems on the opposite side of the housing. The linkage and control mechanism can be reversed such that valves can be mounted in an installation either as a left hand or a right hand valve.

Abstract: A switch assembly for a barbecue grill includes two pipes with a connection tube integrally connected between the two pipes. The two pipes and the connection tube are made by way of casting so as to be a one-piece member. The connection tube has a groove defined in a top thereof and the groove communicates with the two pipes. A cap is connected to the top of the connection tube to seal the groove.

Abstract: An air distribution device comprises a casing (10) provided with a cylindrical wall (12) having at least one air passage opening (14, 16), a shutter (20) mounted so as to pivot with respect to an axis of rotation (X—X) and having a generally cylindrical obturation wall, which is mounted so as to movable with respect to a body of the shutter, consisting of two plates, in a direction substantially radial with respect to the axis of rotation (X—X) of the shutter by virtue of movement means (46, 48) synchronised with the rotation of the shutter, which makes it possible to move the obturation wall (24) away from the wall (12) when the shutter is in an open position (P1, P2) and bring the obturation wall (24) closer to the wall (12) of the casing when the shutter is in a closed position.

Abstract: A control valve for controlling the fluid flow of particulate and other materials through a conduit having a housing accepting the fluid flow received from an inlet conduit. A selectively positionable elliptical shaped diverter plate is positioned in a central chamber formed between two outlet conduits for diverting the fluid flow into one or both two outlet conduits as needed. The diverter plate is dimensioned substantially the same as the configuration as the input ends of both of said outlet conduits and the center chamber. The walls of the input ends of the outlet conduits taper inwardly in the direction of the outlet end decreasing in size allowing the diverter plate to seat against in walls and seal or divert fluid flow from one or the other outlet conduits without the need for a stop or seal.

Abstract: An air distribution valve comprises a gimbal mounted flow directing nozzle connected to a feed conduit and selectively and pivotally advanceable about at least two intersecting and perpendicular axes into alignment with one of four outlet openings in a base plate each opening to an outlet conduit. The gimbal includes an outer gimbal ring supported in horizontal alignment above the base plate and an inner gimbal ring pivotally mounted to and inside the outer gimbal ring and rotatable about a first axis. The flow directing nozzle is pivotally mounted on mounting arms pivotally connected to the inner gimbal ring and pivotal about a second axis which intersects and extends perpendicular to the first axis. When used in a wave generating system, each outlet conduit communicates with one of four caissons at one end of the wave pool for selectively delivering pressurized air to the caisson from a centrifugal fan to force water out of the caissons in a selected order to create a desired wave pattern.

Abstract: A valve for redirecting fluid flow has a valve chamber supporting fluid flow, with the valve chamber having an inlet, a first outlet, and a second outlet. The valve chamber can be closed or partially open. The flap element is movable to alternatively block the first outlet and the second outlet. In or immediately adjacent to the valve chamber are opposing first and a second catch mechanisms for controllably latching the flap element to block respectively the first outlet and the second outlet. The first and second catch mechanisms have a disabled state and an activated state for holding and allowing release of the flap element. Once the first or second catch mechanism is disabled, the flap element is free to move to another position, provided it can overcome the mechanical fluid flow forces that tend to hold it in position.

Abstract: A valve apparatus used in heating and cooling systems in which a valve housing, a valve element, a drive mechanism, and a torque limiting mechanism operate to open and close the valve element between different ports to allow fluid flow through the flow passage within the valve. A torque limiting mechanism comprising a spring limits the amount of torque required by the motor by using energy stored in the spring to assist in maintaining the valve element in a closed position, or to maintain the valve element in an intermediate position for the regulation of flow through the valve flow passage in both mixing and diverting applications. The valve mechanism includes a motor driven mechanism with a de-energizing circuit to stop the rotation of the motor upon the motor driven mechanism applying a predetermined amount of compression to the spring. The compressed spring exerting a substantially equal force to the valve element for closing the different ports.

Abstract: Equal distribution of two phase fluid between tow outlets is assured by an assembly which switches full fluid flow alternately between the two outlets on a timed basis. Distribution can be made for either impact T or branch T junctions without a quality variance as full flow is always directed into one or the other of the two outlets.

Abstract: A valve array for supporting objects such as paper with controlled fluid flow is disclosed. Optional valve arrays can be used to controllably eject marking agents for marking or coating a paper or other suitable substrate. Each valve in the valve array has one or more flap elements positioned in a valve chamber. These flap elements are movable to alternatively block the fluid flow through valve chamber outlets with the aid of various catch mechanisms for controllably latching the flap elements. The catch mechanisms have a disabled state and an activated state for holding and allowing release of the flap elements. Once the catch mechanism are disabled, the flap elements are free to move to another position, provided they can overcome the mechanical fluid flow forces that tend to hold it in position. To counter and utilize such forces for moving the flap elements, an impulse mechanism kicks the flap element into the valve chamber, away from the catch mechanisms.

Abstract: A valve includes a valve chamber and at least two flaps capable of opening to provide an outlet for fluid or closure to block fluid flow. In or immediately adjacent to the valve chamber are catch mechanisms for controllably latching flap elements in an open or a closed position. In normal operation, the flaps open and close at a certain oscillation frequency in response to oscillatory fluid pressure differentials. Since the flap elements move, oscillations eventually bring the flap elements into catchment range of catch mechanisms capable of holding the flaps open or closed.

Abstract: A three-way valve for changing over the direction of flow of high-temperature gas which can completely close flow paths and which is durable enough to prevent increase in leakage of gas even if the gas is engine exhaust. A valve mechanism provided in a valve chest includes an arm pivotable about a pivot shaft, a support rod mounted on a valve pressing portion of the arm, and two valve bodies supported on the support rod on both sides of the arm so as to be pivotable. The valve bodies have flat sealing surfaces adapted to be brought into surface-to-surface contact with flat valve seats formed at the inlets of bifurcated paths.

Abstract: An air distribution valve for use in a passageway of an environmental control system. The air distribution valve comprises a valve body including an input and multiple outputs defining a volume. The valve body is adapted for placement in the passageway for receiving the air in the input. A valve member is used for selectively distributing the air between the multiple outputs. Damping devices for damping the unstabilizing effect of the air flow on the valve member as the air flows to the multiple outlets allow, allowing for the lowest pressure drop configuration. An environmental control system designed for use with a vehicle includes an air cycle machine for conditioning air, ducting for distributing the air within the vehicle for a plurality of uses, and an air distribution valve for use in the ducting. The air distribution valve comprises a valve body including an input and multiple outputs defining a volume. The valve body is adapted for placement in the passageway for receiving the air in the input.

Abstract: An apparatus for converting a conventional rectangular HVAC duct to a flat oval shaped duct where a conventional rectangular duct fitting is provided with a converting means to convert the opening from rectangular to a flat oval. The converting means is formed by a pair of arcuate members defining semi-circular edges and having recesses to receive portions of parallel members. The apparatus utilizes two sheet metal pieces which are formed in arcuate contours that connect between flat edges of parallel sheets to form the oval shape.

Abstract: A pump adaptor outlet pipe is provided with a smaller diameter section to be secured to the outlet of a pump and a larger diameter section connected to the smaller diameter section by means of an annular shoulder. The small diameter section and the larger diameter section, as well as the shoulder, are completely lined with ceramic tile material. An in-line flow diverter pipe section is provided with a pivoted value plate. The value plate and the pipe section are completely lined with ceramic material for diverting the flow of material passing through the pipe section proportionally between two smaller diameter outlet pipes.

Abstract: A liquid flow path selection device comprises a feed channel and a housing having a first and a second continuation channel. The device further comprises a flexible, sheet-shaped selection element having a first and a second side, opposite each other, wherein at least a portion of the selection element forms a partition between the first and the second continuation channel. The selection element is connected to the housing along at least a portion of its circumferential edge. The selection element and the housing have such dimensions relative to each other that the selection element is movable between a first and a second extreme position in such a manner that in a first extreme position, the first side forms a concave surface guiding a flow of liquid from the feed channel into the first continuation channel and in a second extreme position, the second side forms a concave surface guiding a flow of liquid from the feed channel into the second continuation channel.

Abstract: A change-over valve unit has a change-over valve for switching a bypass passage and an exhausting passage disposed in parallel therewith. An adsorbent is disposed in the bypass passage to adsorb exhaust components. An actuator of the change-over valve is isolated from an adsorption cylinder by a pedestal. Furthermore, rotary shafts of the control mechanism of the change-over valve are positioned within the bypass passage of the adsorber when the change-over valve is positioned to open the main exhaust passage. Thus, the heat of the exhaust gas flowing through the main exhaust passage is not transmitted to the rotary shafts.

Abstract: A gas turbine system has a shaft assembly for controlling a flap for the hot gases in the form of a solid stub shaft connected to a tubular shaft via a mechanical entrainer system either in the form of a set of links articulated to the stub shaft and the tubular shaft or in a radial claw arrangement in which between radial claws on the stub shaft, axial entrainers of the hollow shaft engage.

Abstract: A table saw is disclosed comprising a main saw unit and an air table attachment. The air table is mounted adjacent a main support surface of the main saw unit, and includes a body portion and a generally planar table top. The body portion has a plurality of subsections formed therein. The table top is substantially coplanar with the main support surface, and is attached to the body portion to cover the subsections so that a plurality of holes through the table top communicate between the subsections and the exterior. A shop vacuum produces either a partial vacuum or a stream of pressurized air, and a manifold attached to the body portion selectively communicates the vacuum or stream of air to one or more of the subsections to respectively produce either a suction force or a supporting air cushion over a variable portion of the table top. Preferably, the air table is movable along the front and rear guide rails in a direction transverse to the direction of rotation of the saw blade.

Abstract: The present invention provides an improved hot gas control valve (20) which is adapted to apportion a gas flow, such as that issuing from a solid propellent gas generator, among a plurality of outlets communicating with rocket thruster nozzles (36). The improved valve has a body (21) and a valve member (22). The body has an inlet (24) communicating with an internal cavity. The cavity is partially bounded by a partially-spherical concave surface (32). The body has a plurality of outlet passages terminating in ports at the concave body surface. The valve member is operatively arranged within the cavity for omni-directional pivotal movement therewithin. The valve member has a surface (40) sealingly engaging the body concave surface and terminating in an edge (41). This valve member edge cooperates with the body ports to form variable-area metering orifices (A, B, C and D) therebetween.

Abstract: A flap valve, particularly used for a conductor of large cross section, includes a valve housing and a flap member mounted in the housing for pivoting movement about a first axis through an angle of approximately 90.degree. between two extreme positions. A drive shaft is mounted in the housing for rotation about a second axis, and a tension lever is fixed to the drive shaft and rotatable therewith about the second axis. A joint rod is pivoted at a first end thereof to the tension lever and at a second end thereof to the flap member at a position substantially centrally thereof. Rotation of the drive shaft and the tension lever about the second axis moves the joint rod and thereby pivots the flap member about the first axis from one extreme position to the other. The second axis is positioned relative to the first axis to ensure that an angle of rotation of the tension lever to move the flap member between the two extreme positions thereof is approximately 90.degree. to 150.degree..

Abstract: A control mechanism for simultaneously supplying air to a refrigerated compartment in two separate air streams includes a housing having an inlet communicating with first and second outlets. A first valve seat interconnects the inlet and first outlet and a second valve seat interconnects the inlet and second outlet. A unitary valve member rotatably mounted in the housing is movable between a closed condition engaging both of the valve seats to block air flow from the inlet to both of the outlets and an open condition out of engagement with both of the valve seats to permit air flow from the inlet to both of the outlets. A temperature responsive mechanism senses the temperature in the compartment and controls the condition of the valve member in response to the sensed temperature.

Abstract: An improved hot valve system for use in a hot melting kettle of the type used for substances such as asphalt includes a surge chamber having a first outlet in fluid communication with a vertical discharge pipe, and a second outlet open to the interior of an asphalt kettle. The surge chamber has a diameter greater than that of the discharge pipe. Molten asphalt within the kettle is pumped into the surge chamber via a pipe connected to the output flow from a submerged pump. A manually operable valve has a closed condition in which it blocks the flow of asphalt through the second outlet in the surge chamber to compel the flow of asphalt through the vertical discharge pipe, and an opened condition in which asphalt flows out the second outlet and into the kettle.

Abstract: A device for controlling the circulation of a fluid through a fluid bypass (3) consists of an actuator (14) which is actuated pneumatically and directly by the fluid located in the bypass so as to close, at least partially, bypass outlet (3c) when the pressure of the fluid in the bypass is higher than a predetermined pressure threshold (PO).

Abstract: The invention relates to a discharge system for combustion gases of a gas turbine or the like, whereby one end of the discharge pipe is connected to the gas turbine or the like, whilst the other end of the discharge pipe is connected to a heat exchanger. A branch pipe, which extends transversely to the discharge pipe, is connected to said discharge pipe. A valve mechanism is disposed near the connection of the branch pipe to the discharge pipe, which valve mechanism is pivotable between a first position, in which the end of the branch pipe connecting to the discharge pipe is closed, and a second position, in which the discharge pipe is closed downstream of the connection of the branch pipe to the discharge pipe. At least one curved guide vane is provided, which, in the second position of the valve, is located upstream of the valve mechanism, at least partially within the discharge pipe, and which extends downstream from its upstream edge, in the direction of the branch pipe.

Abstract: The lower lip of an aircraft inlet cowl has a first transverse slot formed through an upper surface of the lower lip while a second transverse slot is formed through a lower surface of the lip. A rotating vane is transversely located in the interior of the lip, between the upper and lower slots. A duct located within the interior of the lower lip delivers pressurized engine bleed air to the rotating vane. Selectively driven gears position the vane so as to block either one or the other of the slots, depending upon aircraft speed, so that normal cowl inlet air is energized in the vicinity of the slot outlet. This prevents separation of the normal inlet airflow from the cowl surface - and reduces drag that would otherwise develop.